From owner-freebsd-isp Sat Aug 24 12:40:04 1996 Return-Path: owner-isp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id MAA24617 for isp-outgoing; Sat, 24 Aug 1996 12:40:04 -0700 (PDT) Received: from MindBender.serv.net (root@mindbender.serv.net [205.153.153.98]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id MAA24567 for ; Sat, 24 Aug 1996 12:39:15 -0700 (PDT) Received: from localhost.HeadCandy.com (michaelv@localhost.HeadCandy.com [127.0.0.1]) by MindBender.serv.net (8.7.5/8.7.3) with SMTP id MAA05511; Sat, 24 Aug 1996 12:35:47 -0700 (PDT) Message-Id: <199608241935.MAA05511@MindBender.serv.net> X-Authentication-Warning: MindBender.serv.net: Host michaelv@localhost.HeadCandy.com [127.0.0.1] didn't use HELO protocol To: Joe Greco cc: freebsd-isp@freebsd.org, mvanloon@microsoft.com Subject: Re: Anyone using ccd (FreeBSD disk striper) for news In-reply-to: Your message of Sat, 24 Aug 96 11:31:26 -0500. <199608241631.LAA28292@brasil.moneng.mei.com> Date: Sat, 24 Aug 1996 12:35:46 -0700 From: "Michael L. VanLoon" Sender: owner-isp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >At $60 a controller I say stuff the machine with controllers and spread >your disks out over them! (On a PCI system that means 3 SCSI controllers, [...] >Your drives then obviously get spread out among the busses. Note: I stripe >_across_ busses because I intuitively believe that this may give me better >response. Could you give me an example? How does this fit your scheme: two AHC2940UW's (I can probably get these easier than NCR controllers -- cost isn't a significant factor) with tagged-command-queuing enabled, four drives (2-4GB), two per controller. If I put a single ccd across all of them, going in the order 1, 3, 2, 4. Does that sound like a fairly well optimized start? Or, maybe even three AHC2940UW's with six drives, 1, 4, 7, 2, 5, 8, 3, 6, 9, in a single large ccd. Once you star getting multiple ccd filesystems in the news spool, things become much more complicated (keeping things balanced between different filesystems). ----------------------------------------------------------------------------- Michael L. VanLoon michaelv@MindBender.serv.net --< Free your mind and your machine -- NetBSD free un*x >-- NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3, Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32... NetBSD ports in progress: PICA, others... -----------------------------------------------------------------------------